<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>TestAPI</title>
</head>

<body>

  <input type="text" id="message">
  <button id="submit">提交</button>

  <script>
    //创建WebSocket实例
    let websocket = new WebSocket("ws://127.0.0.1:8080/test")
    //ws 就是 webSocket
    //给创建的实列挂载回调函数
    websocket.onopen = function () {
      console.log("连接建立")
    }

    // e 是事件对象 date是时间属性 收到的数据
    websocket.onmessage = function (e) {
      console.log("收到消息：" + e.data)
    }

    websocket.onerror = function () {
      console.log("连接异常")
    }

    websocket.onclose = function () {
      console.log("连接关闭")
    }


    //前后端 这四个属性是完全匹配的

    //实现点击按钮，通过webSocket发送请求
    let input = document.querySelector("#message")
    let button = document.querySelector("#submit")
    button.onclick = function () {
      console.log("发送消息：" + input.value)
      websocket.send(input.value)
    }

  </script>
</body>

</html>